1 - work somewhere else then after couple of years of xp in a field try to find a job opening that matches your xp (that’s how i got in).
2 - if you are in Uni, apply for internship. We always welcome interns.
3 - apprenticeship: there is a program so that you can start working after college. I know some people went this route and are now full time employees.
4 - other ways like PhD etc...
Bottom line is: you don’t need a fancy uni (I did a state uni in france). What’s important is that you are good at what you do and you do it for yourself, not just to work in a FAANG company.
Tips: Skills that Google is looking for: critical thinking, collaboration, communication, analysis of trade offs and being a genuinely nice person.
Books that got me into Google: The Algorithm Design Manual by Skienna Grokking Algorithms by Aditya Bhargava
From books I like "Elements of Programming Interviews" and also "Cracking the coding interview", even though it's little lightweight.
Then make your LinkedIn profile nice and shiny and contact the recruiters.
I've known some that have worn VERY conspicuous clothing every day such that it can't be avoided or not talked about. Have a "hidden genius story" like you dropped out of high school but are now an idiot savant genius developer. These are all real world cases of google hires I know.